Yii2, Grid view, Label - how to make a label from several fields by foreign key?

Question

Yii

The example is rather trivial.
I have two tables. I display services, they have a user id. Instead of id, I want to display the last name and first name, which are stored in the users table.
I follow this instruction:
php-lessons.com/blog/2016/06/06/yii2-view-data-ral...
created a function in the service model:

// получаем пользователя по ID
    public function getUser() {
        return ($this->hasOne(UserRecord::className(), ['id' => 'user_id']));
    }

In the view that is responsible for the output of services, when calling the widget, I specify:

...
array('attribute'=>'user_id','filter'=>$users,'label'=>'User','value'=>('user.last_name')),
...

And everything is fine, but this is only a surname.
And how can I display user.first_name and user.last_name in this column separated by a space?!
Everything that came to my mind, falls with errors! (

Answer 1

You need to create a new method in the User model:
Alternatively, create an anonymous function in the view:

public function getFullName(string $separator = ' '): string
{
    return implode($separator, array_filter([
        $this->firstName,
        $this->middleName,
        $this->lastName
    ]));
}

'value'=> function($model) {
return $model->first_name .' '. $model->last_name
}

Use:

user.fullName
//или

$user->getFullName(', ')

Answer 2

value => function (value) { return value->user->lastName .’ ‘.  value->user->firstName;